Condenser-control mechanism



A 1,614505 Jan. l18,1927. CIE'TRUBE CONDENSER CONTROL MECHANISM Filed Sept. 17 1925 lNvENToR (707/ I.' 7%/ e Patented Jan. 18, 19127.

untreu strains CARL E. TEUEE, FMPLEWOD, NEW JERSEY..

CNDENSER-GNTBOL MECHANISM.

,Application tiled September I7, 1325. Serial No. 56,795.

rlhi's invention'relates to condensers and control mechanism therefor.

Most radio receiving sets, as is Well known, include a .pluralityv of similar units, such 6 as condensers, and it is desirable that means be provided for simultaneously malrmg similar adjustments of all of the units. Moreover, for accurate tuning, it is advantageous to provide tor independent minute or Vernier l adjustments'of each unit or condenser.

Certain condensers now in use have separate elements or plates controlled inde-- pendently of the remaining plates, buty such an arrangement cuts down the range ot cal pacity of the condenser.

'lhis invention has for its salient object to provide a condsenser control for a plurality ot condensers so yconstructed and arranged that the maximum range or ratio between maximum and minimum capacity can be ob' tained.

`Another object ot the invention is, to provide a condenser control whereby equal-sin multaneousadjustments ot the movableele- W5 ments ot a plurality of condensers can be effected and an independent Vernier adjustment of the movable elements ot each condenser can be obtained.

Another object ot the invention is to prom vide simple and practical control means for simultaneously adjusting a plurality of va riable condensers and 'for independently adjusting each ot the variable condensers.

Further objects of the invention will ap t@ pear from the following speciication taken in connection with the drawings, which form a part ot this application, and in whichlli`g. 1 is a trontfelevational view of a portion of a panel having mounted thereon o condensers controlled in accordance with the invention. v A

Fig. 2 is a 'top plan view ol' the structure sho-Wn in'Figl, two of the condensers being omitted forthe sake of clearness. Fig. 3 is an enlar ed detail elevation showing the Vernier a justinent tor' one ot the condensers. Y

lFig. 4 is a sectional elevation taken through the gearingv and central control 50 shaft, and i Fi 5 is a view similar to Fig. 1, but" showing a slightly different embodiment of Athe invention.

The invention briefly vdescribed consists u of the combination oa plurality of variable condensers, each having fixed elements and 'movable elements and means for simultaneously eiecting the adjustment of the 4nievable elements of all of the condensers and means for electing an independent adjustment of the movable elements of each condenser. Further details of the invention will appear from the following description.

ln the embodiment of the invention illustrated. in Figs. 1 to 4 inclusive, there are shown four variable condensers A, B, C and l) mounted on a panel 10.

The condensers may be of any desired construction, but as illustrated, each con`- `denser comprises a frame 11 secured to the panel and having mounted thereon uned plates 12. Each condenser also has a spindle or shaft 13 mounted in the frame 11 and the-.movable plates 14 are secured to the spindle or shaft 13 in any desired manner.

A supporting frame 20 is secured to the central portion of the panel 10 and has bearings 21 and 22 in which. is mounted a shaft 23. The shaft 23 has secured thereto a pair of gears 24 and 25.

There are also pivoted on the shaft a plurality of arms 30, 31, 32 and 33, which are shown as L-shaped, the arms and 31 being disposed above the shaft and the arms 32 and 33 being disposed below the shaft.

Each arm has rotatably mounted thereon intermediate its ends a gear or pinion, these pinions bein indicated as 35, 36, 37 and 38. 'lihe pinions 35 and 38 mesh with the gear 24 on opposite sides of the axis thereof and the pinions 36 and 37 mesh with the gear on opposite sides ot the axis ot said ear. g Pinions 35, 36, 37 and 38 have meshing therewith racks40, 41, 42 and 43,V the racks being mounted between the arms and in;

turned ends'45 formed on or carried by the arms.

lin order to maintain the racks in mesh .with the pinions, each arm has secured to its outer end a spring stri 46 which engages. the outer surface of t e rack.

Each of the condenser shafts 13 has secured thereto a pinion 50 adapted to mesh with one `ot the racks 40, 41, 42 or 43 and the racks are held in mesh wlth the pinions 50 by means of spring strips 51 carried byl arms 52 which in turn are pivoted on the shafts 13. I

Since the gears 37 and 38 are on the opposite side of the axis ot the actuating gears 24 and 25 from the gears 35 and 36 and it -ment of each condenser.

-has secured to its outer end a knob 55.

When the Shaft 23 ,is rotated, it will be 'obvious that the gears 24 and 25 will communicate the rotation of the shaft through pinions 35, 36, 37 and 38 and racks40, 41, 42 and 43 to the shafts 13 of the condensers A, B, C and D, thereby eiecting-an equal simultaneous adjustment of the movable plates of all of these condensers.

V ernier adjustnwnt.

It is also desirable as hereinbefore stated to provide for a minute or Vernier adjust- This is accomplished in the embodiment of the invention shown in Figs. 1 to 4 by means of four vernier shafts or spindles 60, 61, 62 and 63 which are disposed around the master control shaft 23. Each of the Vernier shafts or spindles has secured thereto a disk 65 and the disks 65 are eccentrically connected to the arms 30, 3l, 32 and 33 by means of links 66. It will be noted that each of the links 66 is pivote'd to its arm at a point 67 intermediate the free end of the arm and the pivotal connection of the arm to the shaft 23. j

Referring to Fig. 3, it will be noted that the arm shown therein can be oscillated through an angle indicated as at' by means of adjusting the Vernier spindle 62. It will be evident that the movableplates of any of the four condensers can be given a minute or Vernier adjustment by rotating or oscil lating the Vernier spindle associated with that condenser.` e

In Fig. 5, a slightly different form of the invention is illustrated in which the various adjustments above described are accomplished by means of lev'ers instead of by means of gears, pinions and racks.

In this form of the invention, the Amaster control shaft 70 has connected thereto an arm 71 which in turn is connected by a link 72 to an arm 73. The arm 73 is pivotally supported by an arm 74 mounted on a fixed pivot 75 and connected to the arm 73 intermediate its ends at 76. T he upper end 77 ofdisk 82 secured thereto whic the arn173`is connected by a link 78 to an armA 79 which in turn is secured to the con' denser spindle or shaft 80 `of condenser C, fourcondensers A, B, C and D being shown.

In orderto effect avernier adjustment of the condenser` C, a -vernier s indle 81 has a in turn is eccentrically connected by a link 83 to the `point 76 on vthe arm. By oscillating' the spindle 81, the arm-73 can be swung on the link 74, thus eiecting a slight' or minute movement of the movable plates of condenser C.

Each of the condenSers A, B, C and D is adjusted in a similar manner and each arm 7 3 of the linkage connected to each condenser is connected by linkage 85 to the arm 71 carried by the master control shaft 70.

With the embodiment of the invention shown in`Fig. 5, it will be obvious that rotation of the master control shaft 70 Will efect an equal simultaneous adjustment of the movable plates of each condenser and, fur` having a movable element, a master control shaft, separate mechanisms connecting said shaft and each of said movable elements to cause movement of the master control shaft to be imparted to each of the movable elements of the several condensers, a part of each connecting mechanism being arranged to rotate about an adjustable point, the position of which point determines the location of the movable element of its respective condenser relative to the master control shaft, and means for changing the position of each -of said adjustable points.

In Witness whereof, I have hereunto set my hand this first day ot' August, 1925.

CARL E. TR'UBE. 

